datsun-roadsters
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Re: Cruising Speed & Alignment

To: rvedgar@bellsouth.net
Subject: Re: Cruising Speed & Alignment
From: tomph@ix.netcom.com
Date: Mon, 24 May 1999 16:50:50 -0500 (CDT)
Hi Ron, 

Well, here's a topic I guess I should know something about having gone 
cross country twice in it. 

><snip>
>Tires are new, steering
>has the minimum 1" of play, 

I guess I would stop right there. I have a 14.5" diameter steering wheel on 
mine and I have approx 1/2" max play. Of course, this is after I had the 
steering box worked on and the idler box bearing and shaft replaced. (Thanks 
Les and Barrie) A little play here can make things seem very sloppy very 
quickly. I remember I let Tom Walter drive it when I stopped by his place in 
Texas and he was surprised I could drive it at all. 

The drive out was a "white knuckle" experience all the way and each time a 
semi blew by it was a real gut test. It felt more like I was nursing the car 
back to the center of the lane rather than driving it there. 

In addition, a road with a good crown on it was also an interesting 
experience. Caster, as I recall, will make the car tend to want to steer 
uphill, but I guess all the slop in the linkage just made it wander all 
over.  

>computer alignment is the best the shop could
>do.  Camber is .2deg left, .9deg right.   Caster is 1.5deg left, 1.2deg
>right.   Toe is -.01deg left, .07deg right.  This is very close to spec.

Won't comment on that. I know I had a little more aggressive alignment than 
normal (or so I was told) but I don't have the figures in front of me so 
I'll pass on further comment.

>So why at 65 to 70 do I fell like its not stable??  Is it just that I have
>forgotten how much a small 2000lb car can be blown around or do I need more
>adjustment???  

Winds can still be felt but nothing like before.

>The tech said he could adjust it more but that  I would get
>more tire wear.  Should these  roadsters cruise at 70 with very little
>steering adjustment 

Yes!!!

or do you need to be
>correcting for wind and road continually at speeds over 55 ???  

No!!!

I love the
>car it is a hoot to drive and at 45 to 55 its one hand and relaxed.  At 70
>its two hands and not relaxed which on a long trip could prove very tiring
>and frustrating.  Feed back please.

I find it's as much fun at 70+ now as it is at 55. However, I do use two 
hands at those speeds just because it's a good idea and not because I feel 
like I have to. 

I'd check all the linkage joints for play especially the idler box on the 
passenger side. 


Good Luck and have a safe trip. 


Tom (road warrior) P

PS. 500 miles for a roadster is a snap. It'll do it without even breathing 
hard. The driver, on the other hand, is another story.


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